Hoisting and dumping apparatus.



L. EATON.

HOISTING AND DUMPING APPARATUS.

APPLICATION FILED OCT. 27, I916.

Patented Jan. 29, 1918.

2 SHEETS-SHEET I.

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L. EATON.

HOISTING AND DUMPiNG APPARATUS.

APPLICATION mmocr. 27. 1916.

1,25%,997, Patented Jan.29, 1918.

2 SHEETS-SHEET 2- LUCIEN EATON, 0F ISHPEMING, MICHIGAN. k

HOISTING AND D UMPIN'G APPARATUS.

Specification of Letters Patent.

Patented- Jan. 29,1918.

Application filed October 27, 1916. Serial No. 128,109.

and DumpingApparatus, of which the following is a specification.

The invention relates to hoisting and dumping apparatus for elevatingand discharging material, and particularly for elevating and dischargingrock or ore from mine shafts and the like. The invention seeks toprovide an improved bucket and dumping *means therefor which can besafely, easily and rapidly operated, and the invention consists in thefeatures of improvement hereinafter set forth, illustrated in thepreferred form in the accompanying drawings and more particularlypointed out in the appended claims.

In the drawings Figure l is a View in elevation of the improved bucketand the dumping means therefor, with the frame work of the hoist shownin section. Fig. 2 is another view in elevation of the bucket anddumping means with the parts shown in section on line 2-2 of Fig. 1.Fig. 3 is a detail view illustrating the construction of one of the dumptrunnions of the bucket.

The framework 10 of the hoisting anddumping apparatus maybe of anysuitable construction and is provided, as usual, at its upper end, witha pulley 11 over which passes a' hoisting rope or cable 12. Oneend ofthe 7 cable is'connected to a winding drum (not shown) and the oppositeend is connected by a clevis 13 and a series of links 14 or in any othersuitable manner to the bail 15 of the bucket 16. I

The bucket is preferably substantially cylindrical, is closed at itslower end and open at its upper end. It is formed of steeland isprovided at its upper edge, in the construction shown, with astrengthcnincr-strap- 17. Bracing straps 18 and 19 exten across thebottom of the bucket and are provided with upturned ends riveted to theside walls thereof. 20 are connected to the side walls of the bucket andare provided with offset cars 21 Short vertically disposed strapsnectedthrough the medium of the bail to the bucket at points well above and inthe" vertical plane of its'center of gravity, and

for this reason the contents of the bucket cannot readily beaccidentally discharged.

A dumping device is provided for the bucket, the latter and the dumpingdevice being provided with cooperating dumping trunnions and trunnionguides or bearings which are arranged to automatically tilt and dump thebucket as the latter is lowered.

Preferably, the dump trunnions are carried 7 upon the lower portion ofthe bucket and the cooperating trunnion bearings upon a chute into whichthe contents of the bucket are discharged. In the construction shown,the dump trunnions 23 are fixed at diametrically opposite points to theside walls of the bucket 16 adjacent the bottom thereof. The trunnionsextend through openings in the upturned ends of the bracing strap 18 andin the side walls of the bucket. shoulders or parts 24 on the trunnionsabut against the outer faces of the straps 18 and nuts 25 on the innerends of the trunnions secure the same in position. The outer reducedends of the trunnions form rivet heads for securing the lower ends ofguard straps Enlarged f 26 thereto. The upper inwardly oflset ends w ofthe guard straps preferably abut againstthe outer faces of the straps 20andare secured to thebody of the bucket by the same rivets.

The chute into which the contents of the bucket are discharged is troughshaped and comprises a bottom 27 and sides 28. The chute is shiftableintoand out of the path I of the bucket and forthis purpose ispreferably pivotally mounted to the frame work.

tion shown in full lines in Fig. 1 andin which position the chute islocated in the vertical path of movement of the bucket.

As the loaded bucket is raised, the swinging chute is maintained in thevertical position shown in dotted lines in Fig. 1 out of the path of thebucket. Suitable bumpers 31 and 32 are fixed to the frame workand limitthe movement of the swinging chute. The

chute an be shifted byhand, a suitable counter-balance being provided toaid in effecting the shifting, or power operated mechanism can, ifdesired, be provided for this purpose.

The guides or bearing members 33 which cooperate with the dump trunnionsof the bucket to tilt the latter are fixed to the side walls 28 of thechute and are preferably spaced therefrom by intermediate spacingmembers In the construction shown the trough-shaped chute and thebearing and spacing members 33 and 3% are formed of wooden boards andthe bearing members 33 project above the side walls 28 of the chute andare provided with guide slots or bearings 35 with parts 36 and 37 onopposite sides of the guide slots, the parts 36 being shorter than theparts 37. T the edges of the slots and the ends of the parts 36 and 37are covered by metal straps 38.

As the filled bucket is elevated the swinging chute is maintained in thevertical position shown in dotted lines in Fig. 1 out of the path of thebucket. The bucket hoisted to a point a little above the top of thechute and the latter is then lowered to the inclined dumping positionwith its upper free end resting on the stop or bumper 32 as shown infull lines in Fig. 1. In this position it should be noted that the guideslots or bearings 35 are inclined and that the adjacent side of the part37 and the end of the part 36 of each guide member form flaring guidesurfaces which aid in directing the dump trunnions 23 of the bucket intothe guide slots or bearings 35 as the bucket is lowered. After the chuteis placed in dumping position the bucket is lowered and turned, ifnecessary, to bring the trunnions in line with the slots 35. As thelowering movement is continued the trunnions move into the lower ends ofthe slots and the bucket tilts into the dotted position shown in Fi l todischarge its contents into the chute. The slotted bearings 35 of thebearing members 33 not only act as bearings for the dump trunnions but,because inclined, they act as cams to move the trunnions and the lowerend of the bucket laterally toward the upper end of the inclined chuteand out of the vertical plane of the hoisting rope and center of gravityof the bucket so that the bucket will be invariably dumped in the samepredetermined direction 71. 6., in line with the chute and toward thelower end thereof. It should be noted that the dump trunnions of thebucket are below the center of gravity of the bucket and substantiallyin line therewith, 2'. 6., these trunnions lie substantially inthe samevertical plane with the center of gravity of the bucket and with thepoints of connection of the bail with the bucket. With rotate the bucketthrough more thana quaro avoid wear,

ter of a revolution in bringing the dump .trunnions thereof in line withthe guides or bearing slots 35 of the members 33. Moreover, since thebearings are arranged to shift the lower end of the bucket laterallytoward the upper end of the chute as the bucket is lowered, the latterwill be invariably tilted and dumped in proper direction even though thedump trunnions are arranged in line or in the same Vertical plane withthe center of gravity of the bucket, when the latter is in normalupright position.

The length of the working portions of the trunnions 23 between theguards 3G and the shoulders 24 is preferably slightly greater than thethickness of the bearing members 33. The outer faces of the shoulders Ql which are opposed to the inner face of the guide members 33 during thedumping operation, are conical. as shown and these conical faces aid inaccurately centering the bucket with respect to the chute.

To prevent the material from passing over the side walls of the chute asthe bucket is dumped the lower ends of the latter are preferablyprovided with sheet metal guards 39 which project above the edgesthereof. From the swinging chute the material passes into a fixed chute40. After the bucket is dumped it is raised above "the chute, the latteris restored to its normal vertical position and the bucket is lowered.

With the improved apparatus large heavy buckets, such as used in mineshafts, can be easily and rapidly dumped. Furthermore the chute coversthe shaft during the dump ing operation and guards against the droppingof material therethrough. The bail which connects the hoisting cable tothe bucket is connected to the latter at the points well above itscenter of gravity so that material cannot readily be accidentallydischarged from the bucket during the hoisting operation. The upperportions of the guards 26 are inclined so that the projecting dumptrunnions cannot be caught upon or strike against anything in the mineshaft during the hoisting operation. For these reasons the improvedhoisting and dumping apparatus can be operated with great safety.

It is obvious that changes may be made in the details set forth withoutdeparture from the essentials of the invention.

1 claim as my invention 1. The combination of a bucket, hoisting devicesconnected to said bucket above and in line with its center of gravity, asupport movable into and out of the path of said bucket, and cooperatingdumping guides and trunnions mounted on said support and on said bucketat points below and in line with the center of gravity of the latter,said dumping guides having means to shift the lower end of the bucket inone direction as the latter is lowered and thereby tilt the bucket inthe opposite direction, substantially as described.

2. The combination of a bucket for mine hoists and the like having abail connected thereto above and in line with its center of gravity anddump trunnions at diametrically opposite points below and in line withits center of gravity, and guides for engaging said trunnions as thebucket is lowered, said guides having inclined cam faces to shift thelower end of the bucket in one direction and automatically tilt thebucket in the opposite direction, substantially as describe 3. Thecombination of a bucket, hoisting devices connected to said bucket aboveits center of gravity, a chute shiftable into and out of an inclinedposition in the path of said bucket and dumping means associated withsaid chute and adapted to engage said bucket below and substantially inline with its center of gravity, said dumping means being arranged toshift the lower end of said bucket toward the upper end of the in clinedchute as the bucket is lowered and thereby automatically tilt the latterin line with and toward the lower end of said chute.

4. In a hoist and dump, the combination of a bucket, hoisting devicesconnected to said bucket above its center of gravity, a. chute shiftableinto and out of an inclined position across the path of said bucket andcooperating dump guides and trunnions mounted on said chute and on saidbucket below its center of gravity, guides having means to move thelower end of the bucket toward the upper end of said chute andautomatically dump said bucket into and toward the lower end of saidchute as said bucket is lowered.

5. The combination of a bucket, hoisting devices connected to saidbucket above its center of gravity, a chute shiftable into and out of aninclined position in the path of said bucket and cooperating inclinedguides and dumping trunnions mounted on said chute and on said bucketbelow the center of gravity thereof and arranged to automatically shiftthe lower end of the bucket toward the upper end of the inclined chuteas the bucket is lowered and thereby tilt the bucket in line with andtoward the lower end of said chute.

6. The combination of a bucket, hoisting devices connected to saidbucket above its center of gravity, a chute shiftable into and out of aninclined position in the path of said bucket, cooperating dumpingtrunnions and bearings therefor mounted on said bucket and said chuteand arranged to tilt the bucket as the latter is lowered, and conicalparts on said trunnions arranged to cooperate with said guides andcenter the bucket relatively to said chute.

LUCIEN EATON.

Copies of this patent may he obtained for five cents each, by addressingthe "Commissioner of Patents,

Washington, D. O.

